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See detailIntegrated continuous flow photoreactors: Photooxidation of (L)-methionine with singlet oxygen
Emmanuel, Noémie ULg; Mendoza Gallego, Carlos ULg; Lismont, Marjorie ULg et al

Poster (2016, October 13)

Development of photochemistry in macroscopic batch reaction vessels is hampered due to inherent limitations: light penetration remains superficial, resulting in inhomogeneous irradiation and hence to side ... [more ▼]

Development of photochemistry in macroscopic batch reaction vessels is hampered due to inherent limitations: light penetration remains superficial, resulting in inhomogeneous irradiation and hence to side-reactions or product degradation due to overexposure. The recent implementation of photochemical processes in microreactors under continuous-flow conditions appeared to be much more powerful than its batch analogue in terms of irradiation efficiency and light penetration. Furthermore, the fine control of residence time ensures an accurate control of the irradiation time, avoiding side-reactions and degradation. The photooxidation of (L)-methionine with singlet oxygen using Rose Bengal as a sensitizer was successfully implemented in a microreactor setup and led to total and selective conversion into methionine sulfoxide, an important building block for the organic synthesis of peptides or functionalized amino acid. The reaction was performed in 20 min while the same reaction in batch took 2h. [less ▲]

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See detailAccuracy of dichotomous logistic IRT models to estimate ability with multiple choice items
Magis, David ULg

Conference (2016, October 13)

This presentation focuse son multiple-choice items without any control or correction for guessing. Most often these items are recoded as binary outcomes (TRUE-FALSE) and logistic IRT models are calibrated ... [more ▼]

This presentation focuse son multiple-choice items without any control or correction for guessing. Most often these items are recoded as binary outcomes (TRUE-FALSE) and logistic IRT models are calibrated using these recoded data. The main purpose of this study is to highlight the limits of this approach by (a) proposing a simulation model to allow for guessing at various levels of ability, and (b) comparing the dichotomous approach to the use of nominal response model. Preliminary simulations indicate that none of the models are very accurate to estimate latent abilities accurately, though the nominal response model has fewer bias then the dichotomous models. [less ▲]

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See detailA Safe and Reliable Continuous-Flow System towards Methylphenidate Hydrochloride
Gerardy, Romaric ULg; Monbaliu, Jean-Christophe ULg

Poster (2016, October 13)

The batch-to-flow translation of a carbene-based strategy for the diastereoselective preparation of the active pharmaceutical ingredient threo-methylphenidate hydrochloride is presented. The continuous ... [more ▼]

The batch-to-flow translation of a carbene-based strategy for the diastereoselective preparation of the active pharmaceutical ingredient threo-methylphenidate hydrochloride is presented. The continuous-flow system implies the generation of an explosive organic azide, its consumption in a diazo transfer reaction, an intermediate purification step followed by a Rh(II)-catalyzed carbene C-H insertion reaction that produces threo-enriched N-Boc-methylphenidate. Boc-deprotection is carried out off-line and provides methylphenidate hydrochloride in 19% isolated yield (3 steps fully telescoped) or 38% isolated yield (sequential). [less ▲]

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See detailCurating Canons of Comics: Daniel Clowes and Art Spiegelman's 'Private' Museums
Crucifix, Benoît ULg

Conference (2016, October 13)

As guest of honor at the 2012 International Comics Festival in Angoulême, Art Spiegelman did not only have a retrospective exhibition devoted to his work, but was also invited to act as the curator of the ... [more ▼]

As guest of honor at the 2012 International Comics Festival in Angoulême, Art Spiegelman did not only have a retrospective exhibition devoted to his work, but was also invited to act as the curator of the CIBDI museum’s archive, producing his own ‘private’ museum, as suggested by the exhibition title Le Musée privée d’Art Spiegelman. Similarly, for Daniel Clowes’s retrospective exhibit in Columbus, the Wexner Center of the Arts hosted Eye of the Cartoonist: Daniel Clowes’s Selections from Comics History, based on Clowes’s curatorial choices from the Billy Ireland Cartoon Library and Museum. In each case, the cartoonist literally frames the history of comics and exhibits his personal canon of comics. As Spiegelman put it: “I have been allowed to highjack the Centre of Bande dessinée Museum to replace what is primarily the Francophone patrimony of comics with my own perverse and private map of what comics are.” This quote clearly embodies the dual facet of such exhibitions – collective and singular, shared and idiosyncratic – foregrounding the anchorage of individual graphic novelists within traditions of comics. Articulated around personal canons, these two exhibitions offer fresh perspectives to think about canonization in the comics world. Albeit focused on two 'canonized' graphic novelists, this case study nuances the auteurism of comics scholarship: not only are these exhibitions the result of collaborative work, they also recast the author in the role of curator. The key aspect of these exhibitions lies in a canonizing act of selection that circulates in varied material forms showcasing the authors’ influences. Mapping out how Clowes and Spiegelman frame their entanglement with the past of comics within the contexts of institutions that store its archive, I will examine the specificities of these exhibitions in relation to a body and style of historiography I call ‘authors’ histories of the comics.’ [less ▲]

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See detailDesign and synthesis of Fe2O3 nanoparticles/N-doped porous carbon structures as high performance electrode for lithium ion battery
Alkarmo, Walid ULg; Ouhib, Farid ULg; Aqil, Abdelhafid ULg et al

Poster (2016, October 13)

Thanks to their fascinating physical properties such as high surface area, multidimensional electron transport pathways and good mechanical strength, three dimensionally (3D) interconnected carbon porous ... [more ▼]

Thanks to their fascinating physical properties such as high surface area, multidimensional electron transport pathways and good mechanical strength, three dimensionally (3D) interconnected carbon porous frameworks have emerged as attractive materials for various electrochemical energy storage/conversion devices, including Li-ion batteries (LIBs), Li−S batteries, supercapacitors and fuel cells. In this context, a hierarchically structured macro- and mesoporous N-doped carbon with dispersed Fe2O3 nanoparticles (NDC@Fe2O3) is prepared by thermal treatment of a novel composite composed by PMMA particles decorated by graphene oxide (GO), PPy and iron salts. The NDC@Fe2O3 composite exhibited high surface area with a hierarchical pores structure. The combination of Fe2O3 nanoparticles with porous carbon to form hybrid anode has been an efficient way to maintain the electronic integrity of the whole electrode since the carbon acts as a buffer layer to accommodate the volume variation and to provide multidimensional electron transport pathways during the charge/discharge process. [less ▲]

Detailed reference viewed: 23 (3 ULg)
See detailPILs as a new active material for radical organic batteries
Aqil, Mohamed ULg; Ouhib, Farid ULg; Aqil, Abdelhafid ULg et al

Poster (2016, October 13)

Detailed reference viewed: 17 (2 ULg)
See detailSynthesis and characterization of non-isocyanate polyurethane (NIPU) hydrogels
Gennen, Sandro ULg; Grignard, Bruno ULg; Thomassin, Jean-Michel ULg et al

Poster (2016, October 13)

Due to its good biocompatibility, biodegradation and excellent mechanical properties, polyurethane (PU) is a material of choice for biomedical applications (gloves, tubing, artificial membranes…) and, as ... [more ▼]

Due to its good biocompatibility, biodegradation and excellent mechanical properties, polyurethane (PU) is a material of choice for biomedical applications (gloves, tubing, artificial membranes…) and, as hydrogels, it was used as wound dressing, soft contact lenses, drug delivery systems and scaffolds for tissue engineering. Classically, PU are synthesized by a step-growth polymerization between poly (di-)ols and poly (di-) isocyanates. Due to the toxicity of isocyanates, REACH regulations have changed and, today, there is a need to develop greener and safer route to produce isocyanate-free PUs. This contribution focus on the synthesis of NIPU hydrogels by copolymerizing a bifunctional CO2-sourced hydrophilic PEG bi-cyclic carbonate with diamines in presence of a cross- linker. The PEG bi-cyclic carbonates was prepared via a CO2/epoxide coupling reactions using a new efficient organocatalytic system based on the use of an ammonium salt (TBAI) in combination with a fluorinated alcohol. [less ▲]

Detailed reference viewed: 22 (3 ULg)
See detailAlkylcobalt as source of radicals for the controlled polymerization of less activated vinyl monomer
Demarteau, Jérémy ULg; Cordella, Daniela ULg; Kermagoret, Anthony et al

Poster (2016, October 13)

Detailed reference viewed: 10 (2 ULg)
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See detailA daily, 1 km resolution data set of downscaled Greenland ice sheet surface mass balance (1958–2015)
Noel, B.; van de Berg, W. J.; Machguth, H. et al

in Cryosphere (The) (2016), 10

This study presents a data set of daily, 1 km resolution Greenland ice sheet (GrIS) surface mass balance (SMB) covering the period 1958–2015. Applying corrections for elevation, bare ice albedo and ... [more ▼]

This study presents a data set of daily, 1 km resolution Greenland ice sheet (GrIS) surface mass balance (SMB) covering the period 1958–2015. Applying corrections for elevation, bare ice albedo and accumulation bias, the high-resolution product is statistically downscaled from the native daily output of the polar regional climate model RACMO2.3 at 11 km. The data set includes all individual SMB components projected to a down-sampled version of the Greenland Ice Mapping Project (GIMP) digital elevation model and ice mask. The 1 km mask better resolves narrow ablation zones, valley glaciers, fjords and disconnected ice caps. Relative to the 11 km product, the more detailed representation of isolated glaciated areas leads to increased precipitation over the southeastern GrIS. In addition, the downscaled product shows a significant increase in runoff owing to better resolved low-lying marginal glaciated regions. The combined corrections for elevation and bare ice albedo markedly improve model agreement with a newly compiled data set of ablation measurements. [less ▲]

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See detailNovel promising way to synthesize non-isocyanate polyurethanes (NIPUs) for innovative coating applications against corrosion protection of metal surfaces
Panchireddy, Satyannarayana ULg; Grignard, Bruno ULg; Thomassin, Jean-Michel ULg et al

Poster (2016, October 13)

Polyurethanes (PUs) are one of the most widely used polymeric materials with applications in automotive, as sealants, adhesives, decorative, aircraft topcoats, for coatings or as foams for thermal and/or ... [more ▼]

Polyurethanes (PUs) are one of the most widely used polymeric materials with applications in automotive, as sealants, adhesives, decorative, aircraft topcoats, for coatings or as foams for thermal and/or acoustic insulation. Industrially, PUs are produced by copolymerization between polyols and polyisocyanates. Because of the toxicity issues related to the use of isocyanates, there is a need to develop greener and safer route to produce such polymers. This study reports on the synthesis of new sustainable isocyanates-free PU (NIPU) coatings for aluminium anticorrosion. In a first step, bio- and CO2-sourced cyclic carbonates monomers were synthesized by coupling of epoxydized vegetable oils with CO2 using a new efficient bicomponent organocatalyst. In second step formulations including cyclic carbonates/amines/additives were optimized to produce highly adhesive cross-linked NIPU coatings that show good resistance against solvents and long-term barriers preventing the corrosion of the aluminiumsubstrate [less ▲]

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See detailProfessionnels de la voix : Comment optimiser votre outil de travail ?
Remacle, Angélique ULg

Conference given outside the academic context (2016)

La voix, faiseuse de sons et génératrice de relation, appartient à un univers riche et complexe, longtemps méconnu. Instrument de travail et de communication souvent malmené, la voix est considérée comme ... [more ▼]

La voix, faiseuse de sons et génératrice de relation, appartient à un univers riche et complexe, longtemps méconnu. Instrument de travail et de communication souvent malmené, la voix est considérée comme un dû. La plupart d’entre nous l’utilisent en aveugle…Les usages que nous en faisons sont multiples. Ils dépendent autant de notre appétence à la vocalisation que de notre facilité ou non à accéder à un geste vocal harmonieux. Les bavards parlent à tort et à travers, les timides se taisent, tandis que les insatisfaits convoitent la voix des autres. Certains encore courtisent leur voix et, fascinés, guettant la moindre de ses faveurs, rêvent d’en devenir les maîtres. C’est souvent le cas chez les professionnels de la voix, tels les comédiens, les chanteurs et les enseignants. L’intérêt que nous lui portons parle de nous-mêmes…Tout comme notre corps dont elle est l’émanation sonore, la voix, fonction magique, grandit, se fortifie puis vieillit… Elle peut s’altérer, se fatiguer, changer, nous abandonner. La santé vocale existe. Qui l’eut dit ? Par la complexité de son anatomie et les particularités de sa physiologie, la voix révèle nombre de curiosités inédites dont la connaissance éclaire bien au-delà de ce que nous pourrions penser.Qu’est-ce que la voix ? Comment fonctionne-t-elle ? Peut-on se prémunir de ses défaillances ? Professionnels de la voix, comment gérer la charge vocale qui est la vôtre ? Qu’est-ce que le forçage vocal et comment l’éviter ? Comment grandir en confort vocal et quels sont les grands principes d’hygiène vocale ? Quelles pratiques pour vous aider à mieux connaître votre capital voix ? La méthode Feldenkrais : en quoi peut-elle nous aider à développer notre santé vocale ?Mercredi 12 octobre à partir de 14h30, la Journée de la voix MGEN vous invite en région grenobloise à un moment d’exception : communications scientifiques dispensées par des spécialistes nationaux renommés alterneront avec de brillants intermèdes artistiques ! Éducation vocale des professionnels et bonnes pratiques seront au coeur des propos ! [less ▲]

Detailed reference viewed: 25 (2 ULg)
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See detailSemiochemicals to control wireworms
Verheggen, François ULg

Conference (2016, October 12)

Detailed reference viewed: 30 (10 ULg)
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See detailDroplet formation by squeezing in a microfluidic cross-junction
Van Loo, Stéphanie ULg; Stoukatch, Serguei ULg; Kraft, Michael ULg et al

in Microfluidics and Nanofluidics (2016), 20(10), 1-12

In microfluidics, flow focusing is widely used to produce water-in-oil droplets in microchannels at high frequency. We here report an experimental study of droplet formation in a microfluidic cross ... [more ▼]

In microfluidics, flow focusing is widely used to produce water-in-oil droplets in microchannels at high frequency. We here report an experimental study of droplet formation in a microfluidic cross-junction with a minimum number of geometrical parameters. We mostly focus on the squeezing regime, which is composed of two distinct steps : filling and pinching. The duration of each step (and corresponding volumes of each liquid phase) are analyzed. They vary according to both water and oil flow rates. These variations provide several insights about the fluid flows in both phases. We propose several scaling laws to relate the droplet volume and frequency to the flow rate of both phases. We also discuss the influence of surfactant and channel compliance on droplet formation. [less ▲]

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See detailMigration in Extreme Climate Change Scenarios
Gemenne, François ULg; Blocher, Julia; de Longueville, Florence et al

Conference (2016, October 12)

Detailed reference viewed: 17 (1 ULg)
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See detailDiez preguntas para auto-evaluar el perfil de egreso, el Programa y los cursos en una perspectiva de ABC (Aprendizaje Basado en Competencias) y con enfoque programa en la Ensenanza superior.
Leclercq, Dieudonné ULg

Scientific conference (2016, October 11)

Actualmente las universidades estructuran sus perfiles de egreso, programas y cursos aplicando dos principios esenciales: (1) el Aprendizaje Basado en Competencias o ABC y (2) el Enfoque Programa. En la ... [more ▼]

Actualmente las universidades estructuran sus perfiles de egreso, programas y cursos aplicando dos principios esenciales: (1) el Aprendizaje Basado en Competencias o ABC y (2) el Enfoque Programa. En la presente ponencia se analiza las significaciones e implicaciones de estas expresiones, así como el impacto que tienen sobre las evaluaciones en estos tres niveles. Además se presentan algunas preguntas clave que los docentes pueden (deben) hacerse para autoevaluar sus logros en cada nivel; proceso permanente porque los currículos viven y se trasforman para adaptarse a los cambios en el mundo o para inducirlos. Cada una de las preguntas de autoevaluación se explican en detalle, con conceptos y ejemplos, en el libro Ideas e Innovaciones, Dispositivos de Evaluación de los Aprendizajes en la Educación, o IDEAS (Leclercq y Cabrera, 2014), escrito con la contribución de 16 autores. Para ilustrar lo que se puede hacer al evaluar, en el capítulo 3 de IDEAS, se usa una rosa de los vientos —motivo de la línea gráfica de este encuentro—, la cual describe lo existente o aquello que podría ser. Entre todas estas posibilidades, esta ponencia, presenta aquello que, desde mi punto de vista, se debe hacer. Las preguntas servirán para abordar sucesivamente la estructura de un currículo, la cual puede concebirse como un cubo, que en su cara frontal (dimensión horizontal), contiene a los tres pilares de la formación, siendo el pilar central el de los objetivos o del perfil de egreso, el cual puede articularse en cuatro pisos (dimensión vertical) llamados DIME (competencias Dinámicas, Instrumentales, Metacognitivas y Específicas); el pilar izquierdo representa los métodos y el derecho, las evaluaciones. En este esquema, las evaluaciones a las que puede someterse una propuesta curricular, se sitúan en cuatro niveles de profundidad o de amplitud temporal. El ABC implica que son los docentes, trabajando en equipos, los que deben concebir instrumentos para evaluar desempeños complejos. Se explicará por qué un Enfoque Programa es imprescindible para (1) Concebir situaciones reales o simuladas que agrupen saberes, destrezas y actitudes, (desarrollados en varios cursos), y cómo los docentes, sin perder de vista las competencias (concordancia vertical), pueden preparar a los estudiantes para esto. (2) Que cada curso (o cada actividad de enseñanza-aprendizaje) evidencie la Triple Concordancia entre Objetivos, Métodos y Evaluaciones (concordancia horizontal). Aquí, los criterios de calidad de las evaluaciones serán sólo mencionados, porque los ejemplos de sus aplicaciones a casos concretos se darán en la ponencia de Álvaro Cabrera. Finalmente, expondré lo que es el currículo oculto y cómo combatirlo. Ver documento atado. [less ▲]

Detailed reference viewed: 20 (2 ULg)
See detailRadicalisation violente : comment construire nos interventions ?
Glowacz, Fabienne ULg

Conference given outside the academic context (2016)

Detailed reference viewed: 19 (2 ULg)